/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.polardbx.config;

import com.alibaba.polardbx.common.model.lifecycle.Lifecycle;

import java.util.List;
import java.util.concurrent.Executor;


public interface ConfigDataHandler extends Lifecycle {

    public static final long   GET_DATA_TIMEOUT                 = 10 * 1000;
    public static final String FIRST_SERVER_STRATEGY            = "firstServer";
    public static final String FIRST_CACHE_THEN_SERVER_STRATEGY = "firstCache";

    String getData();

    String getData(long timeout, String strategy);

    String getNullableData();

    String getNullableData(long timeout, String strategy);

    void addListener(ConfigDataListener configDataListener, Executor executor);

    void addListeners(List<ConfigDataListener> configDataListenerList, Executor executor);

    boolean publishSingle(String dataId, String content);

    void clearListeners();

    boolean removeData(String dataId);
}
